package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.CategoryDTO;
import com.sky.dto.CategoryPageQueryDTO;
import com.sky.entity.Category;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.CategoryMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.CategoryService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class CategoryServiceImpl implements CategoryService {
    @Autowired
    private CategoryMapper categoryMapper;
    @Autowired
    private SetmealMapper setmealMapper;
    @Autowired
    private DishMapper dishMapper;
    /**
     * 分页查询
     */
    @Override
    public PageResult pageQuery(CategoryPageQueryDTO categoryPageQueryDTO) {
        PageHelper.startPage(categoryPageQueryDTO.getPage(), categoryPageQueryDTO.getPageSize());
        Page<Category> page = categoryMapper.pageQuery(categoryPageQueryDTO);

        long total = page.getTotal();
        List<Category> records = page.getResult();

        return new PageResult(total, records);
    }

    /**
     * 新增分类
     */
    @Override
    public void save(CategoryDTO categoryDTO) {
        Category category = new Category();
        category.setStatus(StatusConstant.ENABLE);
        BeanUtils.copyProperties(categoryDTO, category);

        // category.setCreateTime(LocalDateTime.now());
        // category.setUpdateTime(LocalDateTime.now());
        //
        // category.setCreateUser(BaseContext.getCurrentId());
        // category.setUpdateUser(BaseContext.getCurrentId());

        categoryMapper.insert(category);

    }

    /**
     * 启用、禁用分类
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        Category category = Category.builder()
                .status(status)
                .id(id)
                // .updateTime(LocalDateTime.now())
                // .updateUser(BaseContext.getCurrentId())
                .build();

        categoryMapper.update(category);
    }

    /**
     * 修改分类
     */
    @Override
    public void update(CategoryDTO categoryDTO) {
        Category category = new Category();
        BeanUtils.copyProperties(categoryDTO, category);

        // category.setUpdateTime(LocalDateTime.now());
        // category.setUpdateUser(BaseContext.getCurrentId());

        categoryMapper.update(category);
    }

    /**
     * 根据id删除分类
     */
    @Override
    public void delete(Long id) {
        //判断当前分类是否关联了菜品，如果已经关联，则抛出业务异常
        Integer count = dishMapper.countByCategoryId(id);
        if (count > 0) {
            //已经关联菜品，抛出业务异常
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_DISH);
        }
        //判断当前分类是否关联了套餐，如果已经关联，则抛出业务异常
        count = setmealMapper.countByCategoryId(id);
        if (count > 0) {
            //已经关联套餐，抛出业务异常
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_SETMEAL);
        }
        categoryMapper.delete(id);
    }

    /**
     * 根据类型查询分类列表
     */
    @Override
    public List<Category> list(Integer type) {
        List<Category> list = categoryMapper.list(type);
        return list;
    }
}
